Occupancy sensing

Occupancy sensing

Motion sensors that control lights according to space occupancy. Passive infrared sensors are the most common. Ultrasonic sensors work better in places with partitions. Sensors have sensitivity and time-out adjustments to fine-tune their use. Wall box sensors with internal switches or dimmers are used for small rooms. Multiple sensors are needed for larger spaces. Energy credit for their use are substantial, and the payback is short for retrofit applications.
References in periodicals archive ?
Murata's fixture-integrated sensor combines occupancy sensing, daylight harvesting, 0-10V analog dimming and Bluetooth mesh radio circuits in conjunction with Silvair's Bluetooth mesh stack into a small cylindrical package.
Occupancy sensing technologies can deliver value beyond optimizing lighting and HVAC; they can also track where customers move in the store to aid analysis of shopping behavior.
The third scenario was based on dedicated occupancy sensing in each workstation with a range of time delays--30, 20, 10, one and zero minutes.
The Blackfin Low Power Imaging Platform (BLIP) leverages the ADSP-BF707 Blackfin processor as well as Analog Devices' optimized software libraries for video occupancy sensing.
Each UP32x supports occupancy sensing, two (2) digital inputs for condensate switch, dirty filter or other fault condition, and an advanced remote sensor bus.
Their experimental studies not only demonstrate the feasibility of IT based implicit occupancy sensing but also reveal that the IT based implicit methods are able to detect beyond simple occupant counts: they are also able to detect occupants' location and activities.
The problem can disable the front airbags, seatbelt pretensioners and the Automatic Occupancy Sensing module.
Bruce Nordman of the Lawrence Berkeley National Laboratory, plus Ken Christensen of the Department of Computer Science and Engineering at the University of South Florida, and other colleagues from those institutions and the University of Puerto Rico at Arecibo, explain how implicit occupancy sensing can be undertaken using existing IT infrastructure.
Lastly, Control Scenario 6, "Wireless Full Dimming," provided the most robust control system, with full daylight dimming, high-end trim dimming, lumen maintenance dimming, and occupancy sensing in all major spaces.
These systems do have a higher first cost than occupancy sensing or timeclock control but can provide greater or additional ongoing benefits.
Light- or vibration-powered products exist, primarily for temperature sensing, but also for window open/closed status, window blind actuators, occupancy sensing, light level sensing, and presence sensing.
Occupancy sensing is usually selected because the owner assumes that the lab's occupants cannot be trained to reliably operate manual controls.